Design of neutral hydrogen ion carriers for solvent polymeric membrane electrodes of selected pH range

1986 ◽  
Vol 58 (11) ◽  
pp. 2285-2289 ◽  
Author(s):  
Urs. Oesch ◽  
Zbigniew. Brzozka ◽  
Aiping. Xu ◽  
Bruno. Rusterholz ◽  
Gabriela. Suter ◽  
...  
Keyword(s):  
Neutral Hydrogen ◽  
Hydrogen Ion ◽  
Polymeric Membrane ◽  
Membrane Electrodes ◽  
Ph Range

Influence of Nonionic Surfactants on the Potentiometric Response of Hydrogen Ion-Selective Polymeric Membrane Electrodes

1996 ◽  
Vol 68 (9) ◽  
pp. 1623-1631 ◽  
Author(s):  
Cecilia Espadas-Torre ◽  
Eric Bakker ◽  
Susan Barker ◽  
Mark E. Meyerhoff
Keyword(s):  
Nonionic Surfactants ◽  
Hydrogen Ion ◽  
Polymeric Membrane ◽  
Membrane Electrodes ◽  
Potentiometric Response

Polymeric membrane electrodes for drug analysis

1988 ◽  
Vol 6 (6-8) ◽  
pp. 717-723 ◽  
Author(s):  
Luigi Campanella ◽  
Mauro Tomassetti ◽  
Franco Mazzei ◽  
Riccardo Sbrilli
Keyword(s):  
Drug Analysis ◽  
Polymeric Membrane ◽  
Membrane Electrodes

Gallium(III)-Schiff Base Complexes as Novel Ionophores for Fluoride Selective Polymeric Membrane Electrodes

2005 ◽  
Vol 17 (15-16) ◽  
pp. 1347-1353 ◽  
Author(s):  
Jeremy T. Mitchell-Koch ◽  
Elzbieta Malinowska ◽  
Mark E. Meyerhoff
Keyword(s):  
Schiff Base ◽  
Schiff Base Complexes ◽  
Polymeric Membrane ◽  
Membrane Electrodes

Potentiometric polymeric membrane electrodes for mercury detection using calixarene ionophores

2010 ◽  
Vol 61 (3) ◽  
pp. 693-704 ◽  
Author(s):  
Sonika Tyagi ◽  
Himanshu Agarwal ◽  
Saiqa Ikram
Keyword(s):  
Heavy Metal Ions ◽  
Aqueous Media ◽  
Active Material ◽  
Potential Method ◽  
Fast Response ◽  
Analytical Tool ◽  
Polymeric Membrane ◽  
Membrane Electrodes ◽  
Industrial Waste Water ◽  
Mercury Detection

It is here established that potentiometric polymeric membrane electrodes based on electrically neutral ionophores are a useful analytical tool for the detection of heavy metal ions from environmental and industrial waste water. PVC based membrane containing p-tert-butyl-calix[4]arenethioether derivative as active material along with sodiumtetraphenylborate (NaTPB) as solvent mediator and dibutylphthalate as a plasticizer in the ratio 45:9:460:310 (w/w%) (I:NaTPB:DBP:PVC) exhibits good properties with a Nernstian response of 29.50±1.0 mV per decade of activity and a working concentration range of 7.2 × 10−8–1.0 × 10−1 M. The electrode gave more stable potential readings when used around pH 2.5–6.8 and exhibits fast response time of 14 s. The sensors were found to work satisfactorily in partially non-aqueous media up to 40% (v/v) content of acetone, methanol or ethanol and could be used over a period of 7–9 months. Excellent selectivity for Hg2+ ions is indicated by match potential method and fixed interference method. The sensors could be used successfully in the estimation of mercury in different sample.

Effect of hydrogen ion changes on vascular resistance in isolated artery segments

1964 ◽  
Vol 207 (1) ◽  
pp. 169-172 ◽  
Author(s):  
Oliver Carrier ◽  
Meredith Cowsert ◽  
John Hancock ◽  
Arthur C. Guyton
Keyword(s):  
Acetic Acid ◽  
Lactic Acid ◽  
Sulfuric Acid ◽  
Nitric Acid ◽  
Perfusion Pressure ◽  
Control Level ◽  
Linear Increase ◽  
Hydrogen Ion ◽  
Isolated Artery ◽  
Ph Range

Isolated arterial segments, 1 cm in length and 0.5–1.0 mm in diameter, were perfused with Tyrode's solution titrated to various levels of pH. Po2, Pco2, and temperature were held at physiological levels; the perfusion pressure was held at 100 mm Hg, and flow was measured by a drop counter. There was a linear increase in flow as the pH was decreased from 7.4, 0.05 units at a time, with an increase of 87% obtained at pH 7.15. As the pH was further decreased, the flow dropped until at pH 6.8 it leveled off slightly above control level. When the pH was raised, there was an initial 35% decrease in flow by the time pH 7.50 was reached, followed by an increase, reaching 50% above control level at 7.65. At still higher pHs a precipitous decrease in conductance occurred, flow leveling off slightly below control level at pH 7.80. Consistent results were obtained on 45 vessels using Tyrode's solution titrated to the desired pH with lactic acid, hydrochloric acid, acetic acid, sulfuric acid, nitric acid, sodium hydroxides, or sodium bicarbonate. These results indicate that vessels have a very narrow pH range in which they maintain physiological tone.

Surfactant-sensitive polymeric membrane electrodes

1977 ◽  
Vol 85 (1) ◽  
pp. 145-161 ◽  
Author(s):  
S.G. Cutler ◽  
P. Meares ◽  
D.G. Hall
Keyword(s):  
Polymeric Membrane ◽  
Membrane Electrodes
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